Stefanos Tsitsipas was eliminated from the U.S. Open on Thursday in a major upset, and he was openly unhappy with his opponent after the match. Tsitsipas ...

Stefanos Tsitsipas angrily hit out at his opponent’s use of the underarm serve after he blew a match point during a humbling US Open exit.

Altmaier used the controversial underhand tactic as part of a rally to win in five sets, 7-6 (5), 1-6, 4-6, 6-3, 7-5, in a ...

NEW YORK (AP) — There’s been a lot of talk about the unwritten rules of tennis during Week 1 of this U.S. Open, whether it’s the necessity of a “ sorry, not sorry ” raised hand after a let cord or the ...

A frustrated Stefanos Tsitsipas took exception to his opponent's tactics after blowing a match point and exiting the U.S. Open in the second round courtesy of a five-set loss to Daniel Altmaier on ...